package com.dao;

import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.LockMode;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import com.model.TChengji;

public class TChengjiDAO extends HibernateDaoSupport {
	private static final Log log = LogFactory.getLog(TChengjiDAO.class);

	protected void initDao() {
		// do nothing
	}

	public void save(TChengji transientInstance) {
		log.debug("saving TChengji instance");
		try {
			getHibernateTemplate().save(transientInstance);
			log.debug("save successful");
		} catch (RuntimeException re) {
			log.error("save failed", re);
			throw re;
		}
	}

	public void delete(TChengji persistentInstance) {
		log.debug("deleting TChengji instance");
		try {
			getHibernateTemplate().delete(persistentInstance);
			log.debug("delete successful");
		} catch (RuntimeException re) {
			log.error("delete failed", re);
			throw re;
		}
	}

	public TChengji findById(java.lang.Integer id) {
		log.debug("getting TChengji instance with id: " + id);
		try {
			TChengji instance = (TChengji) getHibernateTemplate().get(
					"com.model.TChengji", id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(TChengji instance) {
		log.debug("finding TChengji instance by example");
		try {
			List results = getHibernateTemplate().findByExample(instance);
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		} catch (RuntimeException re) {
			log.error("find by example failed", re);
			throw re;
		}
	}

	public List findByProperty(String propertyName, Object value) {
		log.debug("finding TChengji instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from TChengji as model where model."
					+ propertyName + "= ?";
			return getHibernateTemplate().find(queryString, value);
		} catch (RuntimeException re) {
			log.error("find by property name failed", re);
			throw re;
		}
	}

	public List findAll() {
		log.debug("finding all TChengji instances");
		try {
			String queryString = "from TChengji";
			return getHibernateTemplate().find(queryString);
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}

	public List findAllByUserId(Integer userId) {
		log.debug("finding all TChengji instances");
		try {
			String queryString = "from TChengji where stuId = " + userId;
			return getHibernateTemplate().find(queryString);
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}
	
	public TChengji merge(TChengji detachedInstance) {
		log.debug("merging TChengji instance");
		try {
			TChengji result = (TChengji) getHibernateTemplate().merge(
					detachedInstance);
			log.debug("merge successful");
			return result;
		} catch (RuntimeException re) {
			log.error("merge failed", re);
			throw re;
		}
	}

	public void attachDirty(TChengji instance) {
		log.debug("attaching dirty TChengji instance");
		try {
			getHibernateTemplate().saveOrUpdate(instance);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public void attachClean(TChengji instance) {
		log.debug("attaching clean TChengji instance");
		try {
			getHibernateTemplate().lock(instance, LockMode.NONE);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

}
